package util;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.boot.context.properties.ConfigurationProperties;

import java.util.Date;

/**
 * @Author: Mr.Liu
 * @Description:
 * @Date: Created in 14:57 2020/5/24
 */
@ConfigurationProperties("jwt.config")
public class JwtUtil {
    private String key;
    private long ttl;//一小时

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public long getTtl() {
        return ttl;
    }

    public void setTtl(long ttl) {
        this.ttl = ttl;
    }

    /*
     * 生成JWT
     * */
    public String createJWT(String id, String subjet, String roles) {
        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);
        JwtBuilder builder = Jwts.builder().setId(id).setSubject(subjet).setIssuedAt(now).signWith(SignatureAlgorithm.HS256, key).claim("roles", roles);
        if (ttl > 0) {
            builder.setExpiration(new Date(nowMillis + ttl));
        }
        return builder.compact();
    }
    /*
    * 解析JWT
    * */
    public Claims parseJWT(String jwtStr) {
        return Jwts.parser().setSigningKey(key).parseClaimsJws(jwtStr).getBody();
    }
}
